Bracket fastening structure

Abstract

A first fastening portion ( 100 ) for fastening a cylinder block ( 20 ) and a bracket ( 50 ) to each other and a second fastening portion ( 200 ) for fastening a crank case ( 30 ) and the bracket ( 50 ) to each other are so provided as to have interposed therebetween a fastening bolt ( 40 ) for fastening the cylinder block ( 20 ) and the crank case ( 30 ) to each other.

The invention claimed is: 
     
       1. A bracket fastening structure with a bracket securely fastened across both adjacent ones of a plurality of split bodies constituting an engine block, namely, a first split body and a second split body, comprising:
 a first fastening portion, including a first boss having a first thread portion formed therein, for fastening the first split body and the bracket to each other; 
 a second fastening portion including a second boss having a second thread portion formed therein, for fastening the second split body and the bracket to each other, wherein 
 the first boss and the second boss are so provided as to have interposed therebetween a bolt for fastening the first split body and the second split body to each other, and wherein the portion of said bracket extending between said first boss and said second boss is asymmetrical with respect to a straight line extending between said first and said second bosses, and wherein the asymmetrical portion of the bracket is in an L-shape configuration. 
 
     
     
       2. The bracket fastening structure according to  claim 1 , wherein the bracket is provided at end portions of the first split body and the second split body. 
     
     
       3. The bracket fastening structure according to  claim 1 , wherein the bracket is provided at central portions of the first split body and the second split body. 
     
     
       4. The bracket fastening structure according to  claim 1 , wherein the first split body is a cylinder block, and the second split body is a crank case. 
     
     
       5. The bracket fastening structure according to  claim 1 , wherein the first split body is a cylinder block, and the second split body is a cylinder head. 
     
     
       6. The bracket fastening structure according to  claim 1 , wherein the bracket is a bracket for auxiliaries that is fixed to the engine block. 
     
     
       7. The bracket fastening structure according to  claim 1 , wherein the bracket is a bracket for fixing the engine block to a vehicle. 
     
     
       8. The bracket fastening structure according to  claim 1 , wherein the engine block and the bracket are made of materials that are different in thermal expansion amount or thermal contraction amount from each other. 
     
     
       9. The bracket fastening structure according to  claim 1 , wherein the engine block and the bracket are used under temperature environments that are different from each other. 
     
     
       10. The bracket fastening structure according to  claim 1 , wherein the engine block and the bracket are made of materials that are different in linear expansion coefficient from each other. 
     
     
       11. The bracket as claimed in  claim 1 , wherein a part of the bracket is in the form of a sub-component and the sub-component comprises only two bosses located on opposing sides of said bolt.